"The Intrusive Target" -- A World-Class Target
.As exploration has progressed on the main Thor deposits themselves, it became increasingly clear that there is a large intrusive body that is hidden at depth below the existing thor Deposit.
The existence of this feature was first-noted in 2015, when Taranis used a method called geophysical inversions to model the source for a large magnetic anomaly found in the ground magnetic surveys at Thor. The inversion was refined in 2019 when Taranis was able to accurately determine elevations using a LiDar survey.
The source of this anomaly is not exposed in surface, although there are tantalizing places where it is exposed either in drilling, or some of the rocks adjacent to the intrusive are exposed (contact metamorphic rocks). The photograph to the left shows an intrusive dyke that was mineralized with sphalerite and uncovered in a drill hole near Broadview Creek.
The importance of this is that it is not uncommon to have very large, mineralized intrusive bodies underlying higher-grade deposits, and volumetrically these can account for the largest amount of mineralization in a deposit.